题目内容
计算(1)(﹣2)2﹣|﹣7|+3﹣2×(﹣
);
(2)﹣36×(
﹣
﹣
);
(3)﹣16﹣(1﹣0.5)×
×[2﹣(﹣3)2];
(4)(﹣3)2008×
﹣12008﹣(﹣1)2008.
(2)﹣36×(
(3)﹣16﹣(1﹣0.5)×
(4)(﹣3)2008×
解:(1)(﹣2)2﹣|﹣7|+3﹣2×(﹣
)
=4﹣7+3+1
=8﹣7
=1;
(2)﹣36×(
﹣
﹣
)
=
×(﹣36)﹣
×(﹣36)﹣
×(﹣36)
=﹣4+6+2=﹣4+8=4;
(3)﹣16﹣(1﹣0.5)×
×[2﹣(﹣3)2]
=﹣1﹣
×
×(2﹣9)
=﹣1+
=
;
(4)(﹣3)2008×
﹣12008﹣(﹣1)2008
=(﹣3)2008×
×
﹣1﹣1
=
×
﹣2
=
﹣2
=﹣
.
=4﹣7+3+1
=8﹣7
=1;
(2)﹣36×(
=
=﹣4+6+2=﹣4+8=4;
(3)﹣16﹣(1﹣0.5)×
=﹣1﹣
=﹣1+
(4)(﹣3)2008×
=(﹣3)2008×
=
=
=﹣
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